Machine for bending pipe



(No Model.)

H. E. FOWLER.

MAG-HINE'FOR BENDIN'G PIPE.

N0. 397,712. Patented Feb. 12,, 1889.

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MACHINE FOR BENDING PEPE.

SPECIFICATION forming part of Letters Patent N0. 397,712, dated February 12, 1889.

Application filed May 12, 1888. Serial No. 273,733. (No model.)

To all whom it may concern:

Be it known that I, HERBERT E. FowLEn, a citizen of the United. States, residing at New Haven, in the county of New Haven and State of Con ncctient, having invented certain new and useful Improvements in Machines for Bending Pipe; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to machines for bending metal pipe or tubing, and more especially for bending or doubling metal pipe into flat zigzag coilssuch as for ice-machines, cooling apparatus, steam-heating apparatus, or similar pipe having bent or doubled portions at intervals; and itconsists in the improved construction and arrangement or combination of parts hereinafter fully disclosed in the description, drawings, and claims.

The objects of my invention are, first, to provide the periphery of a bendingroller in a machine for bending pipe with an adjustable grip or clamp for clamping the pipe and carrying it around the periphery of said roller; second, to providea two-part bending-roller with radially-projecting clamping or gripping jaws in the peripheries of said parts, and with means for forcing said parts firmly against each other; third, to provide the periphery of one bending-roller with a clamp or grip for holding the pipe, and the periphery of the opposite bending-roller with a corresponding and registering notch or recess for said clamp; fourth, to provide means for adjusting the shafts o1- spindles for the bending-rollers at varying distances from each other, according to the diameter of said rollers; fifth, to provide a 'pipebending machine with two bending-rollers, one of which is provided with means for clamping the pipe and carrying it around with it upon its periphery and with. one guide-roller, and, sixth, to provide a machine by means of which pipe may be bent or doubled at one point, thereupon slid forward to have a straight portion, again bent or doubled in the opposite direction, and so forth, to form a flat zigzag-shaped coil or a flat coil with straight parallel, or nearly parallel, portions,

In the accompanying drawings, forming a part of this specification, and in which the same reference-numerals indicate the same parts, Figure 1 represents a perspective view of my improved machine for bending pipe, and Fig. 2 a vertical section on the line of Fig. 1.

.In the drawings, the numeral 1 indicates the machine table or frame, which is provided upon its under side with bearings 2 for the drive-shaft 3. Said drive-shaft 3 is provided with a suitable drive-pulley, at, at its outer end, and, preferably, with a suitable reversing-gear (not shown) for reversing the revolutions of said shaft whenever desired. The inner end of said drive-shaft 3 is provided with a worm, 5, which meshes with. a worm-wheel, 6, which is secured upon the lower end of a shaft or spindle, 7, journaled in the machine frame or table.

A slide or block, 8, slides in a slot, 9, in the machine table or frame, and has an upwardly-projecting lip or shoulder, 10, at its outer end, against which the inner end of a screw, 11, which fits and turns in a corresponding perforation, 12, in a lip, 13, upon the edge of a machine frame or table, and is provided with a suitable hand-wheel, 1 1, at its outer end, may bear. A shaftor spindle, 8o 15, is journaled in a bearing, 16, in the inner end of said slide or block, and has a cogwheel, 17, upon its lower end, which meshes with a cog-wheel, 18, upon the shaft or spindle '7 below said table or frame, but above the worm-wheel upon said shaft. Said shaft or spindle 7 is formed with a shoulder, l9,which is flush with the machine frame or table, and two halves, 20 and 21, of a bending roller or disk fit upon the shaft or spindle, and are 0 clamped against said shoulder by means of a nut, 22, which fits upon the upper reduced and screw-threaded end, of said shaft or spindle, and is provided with a handle, 24, or hand-wheel or other means for turning it. A washer, 25, is placed between said nut and the upper half, 20, of the roller. Said roller halves 20 and 21 are formed with circumferential grooves or recesses, which form one circumferential groove, 26, nearly semicircu- 10o lar in cross-section, and at registering points of their peripheries said roller-halves are provided, respectively, with a downwardly and an upwardly hooked clamping or gripping jaw, 27 and 98, which jaws have their hooked ends meeting and form a circular eye, clamp, or grip. A pin, 2.9,projects from the face of one of said roller-halves and into a registering hole, 30, in the meeting face of the other roller-half, said pin and hole serving to keep said clamping or gripping jaws registering with each other.

A roller, 31, is detachabl y secured upon the shaft or spindle 15 in the slide 8, and has the same height and diameter as the divided roller 20 21, and is provided with a nearly semi-cylindrical circumferential groove, 32, which registers with the groove 26 in the opposite roller. Said roller 31 is formed with a notch or recess, 33, which extends from the periphery, and is sufliciently deep and wide to receive the clamping or gripping jaws of the opposite roller, which jaws may register with said notch or recess and project into the same whenever said rollers are revolved.

A guiderollcr, 34, formed with a nearlycylindrical circumferential groove, 35, of the same size as the grooves in the bending-rollers, is journaled with its short shaft upon the face of the machine table or frame, and with its groove in a line with the groove in the notched or recessed roller 3]., and in aline at right angles to a line drawn between the centers of said rollers.

In practice the nut 22, which clamps the two roller-halves 20 and 2l together, is loosened sufficiently to admit of the end of the pipe to be bent to be inserted and slid between. the clamping or gripping jaws 27 and 28 up to the place at which it is to be bent. The nut is thereupon tightened, so as to give said jaws a firm hold upon the end of the pipe, whereupon the rollers are started to revolve, the divided roller carrying the pipe around with it until it has been bent sufficiently. The pipe will bear against the guide-roller, and the grooved roller 3]. will bear against the side of the pipe opposite to the divided roller, so that the pipe will retain its shape in the bend without being flattened. The'notch or recess 33 will admit of the pipe remaining in the clamping-j aws during the entire process of bending, as it allows the jaws to pass around between the two rollers, and there will consequently be no necessity for loosening the clamping-jaws and shifting them during the process of bending the pipe, as is necessar i in bending-machines in which there is a removable elamp-upon one roller and no notch or recess in the opposite roller, which shifting of the clamp or clamping-jaws is liable to cause a straight or imperfectly-bent portion in the bend of the pipe at the place which is bent while the clamp is removed. After one bend has been formed and more bends are desired, as in a flat zigzag coil, the clamping-nut 22 is loosened, when the rollers may be reversed, the jaws sliding upon the bend. of the pipe back to their starting point in the recess or notch of the opposite roller. The pipe may now be slid between the clamping-jaws until l [l l it arrives at the point where the next bend to be, when the pipe is turned within the jaws, it the bend is to be in the opposite direction of the former bend, and clamped in said jaws by the clampin g-nut, whereupon the rollers are again revolved and another bond is formed. This bending may be continued for the entire length of the pipe, and as many bends as desired may be formed. at any desired distances from each other without removing the pipe from the clamping-jaws or the jaws from the pipe.

If it is desired to form all the bends in the same direction, the pipe is not turned in the jaws, but the jaws are merely slid back upon the bend of the pipe to the starting-point in the recess or notch in the opposite roller. The pipe is slid forward between the jaws to the n ext bending-point and bent by the revolving rollers.

As the diameter of the bend or elbow formed in the pipe depends upon the diameter of the beruling-rollers, said rollers must be changed and substituted by rollers of suitable diameter when bends of a different diameter are to be formed, and the size of the circumferential grooves in said rollers must correspond to the size of pipe bent by them, as said pipe must fit snugly in 'the grooves and in the clamping-jaws.

The cogs of the two cog-wheels 17 and 18 upon the shafts of the bemling-rollers are of a sufficient length to admit of their meshing with each other under various adjustments of the shaft 15 in the adjustable slide at various distances from the shaft 7 said distances depending upon the diameters of the bending-rollers, the function of said adjustable slide or block 8 being to adjust said shafts or spindles at their proper distances from each other, according to the diameters of the bending-rollers.

' From the foregoing it will be obvious that pipe may be bent or doubled by this machine without loss of time inv stopping the machine while making one bend, and without any irregularities or straight or imperfectly-bent portions in the bends or elbows, 011 account of its being provided with the divided roller and clamping jaws and with the notch or recess in the other bending-roller; that the bendingrollers will travel together on account of their being geared together by the cog-wheels, and will consequently prevent all drawing or flattoning of the pipe, as would be liable to take place if the rollers were not geared, and that bends or elbows ofv various diameters and at various distances from each other may be made from various sizes of pipe by the same machine on, account of the rollers being interchangeable.

Having thus fully described the construction and arrangement or combination of parts of my improved pi pe-bendi ng machine, its operation and advantages, whatl claim as new is- 1. In a machine for bending pipe, a roller provided with a gripping clamp or eye proj ecting radially from its periphery, in combitheir facing sides, a washer upon said shaft and supported upon the top of said roller, and a nut upon the screw-threaded end of said shaft and elai'nping said washerand and adjustable clainpingjaws at its periphcry, of an opposite bending-roller formed With gles to a line drawn through the centers of said rollers, substantially asdeseribed.

10. In a machine for bending pipe, the combination of the machine frame or table formed nationwith an opposite roller havinga groove a similar circumferential groove and in its or recess to receive the said gripping clamp periphery with a notch or recess which regisor eye, substantially as specified. g ters with and receives said. eye, substantially 2. In a machine for bending pipe, a bendas described. ing-roller com 'irising two separable sect-ions, S. In a machine for bending pipe, the COlllleach carryinga part to form a gripping clamp i bination of a frame or table formed with a or eye, in combination with a bending-roller l transverse slot and with a bearing at the inhaving a groove or recess adapted to receive I ner end of said slot, at spindle or shaft jourthe said clamp or eye, substantially as speeinaled in said bearing, a block which slides in tied. said slot, and is formed with a lip at its outer In a iilacllilie for bending pipe, a bend 1 end and a bearing at its inner end, a screw ing-roll formed in two separable sections, and which fits through a serew-threaded perforaeaeh having a circumferential curvililuear tion in a lip upon said table at the outer end groove at their adjacent sides, and also havof said slot and bears against the lip upon ing respectively a part which forms a gripsaid slidingbloclr, a shaft or spindle journaled ping clamp or eye, in combination with a in the bearing in said sliding block,two meshbending-roll having a groove or recess to rein g cog-wheels which are of the same diameceive the said clamp or eye, and also a cir ter, provided with long cogs and secured upon cumferential curvilinear groove to match the said spindles or shafts, means for revolving corresponding groove in the opposite roll, oneof said spindles orshafts, and interchangesubstantially as specified. able bending-rollers upon said spindles or 4. In a machine for bending pipe, the cont shafts, substantially as described. bination of a shaft formed with a shoulder 9. In a machine for bending pipe, the comand with a reduced and screw threaded upbination of a circumferentially-grooved bendper end, a roller which consists of two halves, ing-roller provided with. a projecting clamp-. formed with grooved or recessed edges,which l ing or gripping eye, a circumferentiallyform a nearly semi-cylindrical groove in the g grooved bending-roller formed with a notch periphery of said roller, provided with two or recess in its periphery which registers with registering hook-shaped clamping-jaws in i said eye, and a circumferentially-grooved their peripheries, which form a projecting guide-roller arranged in a line with the space eye, and with a registering pin and hole in between the bending-rollers and at right anl l l roller-halves against the shoulder upon said 1 with the slot fl,the drive-shaft 3, formed with 9 5 shaft, substantially as described.

the worm t, the shaft or spindle 7, formed with In a machine for bending pipe, the combination, with a bending-roller provided with a projecting eye at its periphery, of an opposite l)ending-roller fori'ned in its periphery 2O 2l, formed with the jaws 27 and 28, the with a notch or recess which registers with washer E35 and handled nuts 23 24, the sliding and receives said eye, substantially as deblock 8, having the adjusting-screw 11., the scribed. shaft or spindle 15, j onrnaled in said sliding 6. In a machine for bending pipe, the comblock and provided with cog-wheel 17, the binatimnwith a bending-roller provided with roller 3 1. upon said shaft and formed with the a projecting and adjustable clamp or grip at its periphery, olf an opposite bendii'ig-roller formed in its periphery with a notch or recess which registers with and receives said eye, substantially as described.

7. In a machine for bending pipe, the coinbinaiion, with a bending-roller formed with a slightly less than semi-cylindrical and circ uniterential groove and provided with projecting the threaded end 23 and with the worm-wheel t3 and cog-wheel 18, and journaled in said frame or table, the divided and grooved roller groove 32 and notch or recess 33, and the guide-roller 3i, substantially as described.

In testimony whereof I afiix my sign atnre in presence of two witnesses. 

